Improvement in tools for fastening boiler-tubes



Usare 'rares rrrca,

AAR-O)T VAN GUYSLING, OF NORTH Glt-EENBUSH, NEW-YORK.

IMPROVEMENT IN 'TOOLS FOR FASTENENG BOILER-TUBES.

Specification foi-ming part of Letters Patent No. 450,967 dated December l5, 18C3.

To @ZZ whom t may concern:

Be it known that l, AARON VAN GUYS- LING, of North Greenbush, in the county ot' Rensselaer and State of New York, have invented a new and Improved Tool for FasteniagBoiler-Tubes 5 and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the aacompanying drawings, forming a partot this specification, in which* Figure l represents a side elevation of my invention, showing its application to a boiler. Fig. 2 is a transverse vertical section ot' the stme, the line x m, Fig. l, indicating the plane of section. Fig. 3. is an end elevation of the slotted sleeve detached. Fig. 4 is a longitudinal central sect-ion of the same.

Similar letters of reference in the several views indicate corresponding parts.

This invention is intended as an improvement on a tool for attaching tubes to boilers, on which a patent was granted to Thomas Prosser, April 17, 1840.

The improvement relates to the slotted sleeve which formsthe guide for the segmental expanders, and which is provided with a handle, so that after the conical mandrel has been inserted the tool can be turned, and that by this action thejoint between the tube and the tube-sheetis rendered smootl1,freel'rom ridges or wrinkles, and perfectly tight. Furthermore, instead of making the conical mandrel round from end to end, and to facilitate its removal from the sleeve, in theimproved tool it (the mandrel) is provided with a square or polygonal head, so that a wrench can be applied, and that it. can be removed from the sleeve simply by turning it rJund and without the use of a hammer.

To enabe others skilled in the art to malte and use my invention, I will proceed to describe it.

A represents a sleeve made of cast-iron or any other suitable material, and provided with a conical hole, a., which forms the guide for the tapering mandrel G. This mandrel is made of steel, and it serves to acton the segmental expanders D. Each ot' these expanders is guided by a ange, b, projecting through one of the slots, c, in the sleeve, and they are so shaped that the same when not expanded leave :no gaps between their adjoining edges,

and when expanded they completelyembrace the inner surface of' the tube, With the exception ot' very narrow strips opposite the gaps, which necessarily will open between the ad'- i oinin g edges of the expanders when the mandrel is driven in. As the mandrel is driven into the hole a, it comes in contact with the inner edges of said flanges and forces the eX- panders out. A spring, el, which embraces the expanders, causes them to resume their original position as soon as the conical mandrel is withdrawn. The expanders are provided with double projections, c e', having a hollow or neck,f, between them, and in order to fasten a tube to a tube-sheet the tube is introduced into the mouth of the pipe just far enough to bring the neckfopposite the edge of the tube-sheet, leaving the projections e e one inside and the other out, and the conical mandrel is driven into the sleeve so as to force the expanders out. By this action the projection e forces the end ot' the tube over the outer edge ofthe tube-sheet, and the projection e causes the tube to bulge out close on the inner edge ot' the tube-sheet, as clearly shown in Fig. l ot' the drawings, and the tube is firmly held in place. In forcing` out the eX# panders the edges ofthe same are separated, and gaps g are opened between them, and those portions ot' the tube which are opposite to these gaps are liable to become wrinkled and to leave an open I'atssage between the edge of the tube-sheet and the outer surface of said tube and to produce a. bad and leaky joint. This difficulty I have obviated by the application ofthe handle E to the sleeve, and after the mandrel has been driven into said sleeve and the tube'secured in the tube-sheet, I take hold of this handle and turn the tool in either direction sui'iiciently far to bring the surfaces ofthe expanders to bear on the wrinkles or creases formed by the gaps between said expauders, and thereby these wrinkles are smoothed down and a tight joint is produced between the tube and the tube-sheet.

The conical mandrel U, in order to facilitate its removal from the sleeve atter the tube is fastened in its place, is provided with a square or polygonal head, h, so that a wrench can be i applied and by simply turning the mandrel it is readily loosened and taken out. Vithout this head the mandrel has to be loosened by tapping it laterally with the hammer, and by the jar produced by these taps the joint bei i i l tween the tube and tubesheet is rendered loose and leaky. By turning the mandrel no jar is produced, and the joint between the tube and tube-sheet, if once tight, will not be liable to become leaky by the operation ot' ieno\ ing the mandrel.

My tool can be easily applied t0 all the tubes in an ordinary locomotive or tubular boiler, the sleeve being so constructed that the eXpanders can be introduced without dit'- culty into the extreme tubes next to the circumference of the tubesheet, as Well as to those toward 0r in the center of the same, and the operation of fastening the tubes can be accomplished in a comparatively short time and Without the liability of producing leaky ioints.

Disclaiming all and eveiytliing shown and described in the Letters Patent of Thomas 2. So arranging the segmental eXpanders D in relation to each other and to the sleeve A th at the same when not expanded leave no gaps between their adjoining edges, and when expanded they embrace the largest possible part of the inner surface ofthe tube, as set forth.

AARON VAN GUYSLING.

Witnesses:

JAMES A. PRATT, J oietNv H. ADAMs. 

